I have been working on implementing TouchGFX in DSI Video Mode for a STM32H747-DISCO board. The LCD is a 5" 720x1280px panel, driven by a ILI9881C driver chip. After many issues with the DSI link, I have now successfully got something to display on the screen, but it is an absolute mess.
This is my GUI
And this is my display output (the diagonal red lines are on the screen protector)
A bit more info...
The driver IC is designed to be in portrait orientation, with 1280 lines at 720px width. This is how I have configured the DSI (720px video packet, 1280 VACT), LTDC (720 active width, 1280 active height & layer settings) and TouchGFX. I have set the desired orientation to landscape in TouchGFX.
The screen is updating. I have a 10s splash screen that just displays a logo and then switches to the GUI. I can see the screen change after 10s, and some activity which will be coming from my live GUI. However, the activity only ever changes a whole line (really a column in terms of the actual screen arrangement).
Is this more likely to be to do with the LTDC timings - horizontal and vertical blanking periods etc. - or down to the configuration of the frame buffer itself? There's also a chance there's something wrong in my driver initialisation, but I want to rule out micro-side issues first!
